Question about Philips Magnavox 51MP392H Rear Projection Television

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IHVT (integrated high voltage transformer)


Is there any place online to purchase one for the MAGNAVOX 51MP392H?

Thanks

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Try www.electronix.com

Posted on Sep 18, 2008

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1 Answer

The tv is a Magnavox 51MP392H/17 and has sound but no picture. Any ideas?


TV is in high voltage shutdown protection mode. Check to see if Horizontal output transistor is shorted or open. If not then resolder all solder joints on HV transformer. If this does not fix it then you will need to do voltage checks off of H.O.T. and then possibly a bad HV transformer.

Apr 30, 2010 | Philips Magnavox 51MP392H Rear Projection...

1 Answer

SHORTED OUTPUT MAGNAVOX TV


Hello valexandrur,

You are in the correct section, now your problem may be a shorted Integrated High Voltage Transformer (IHVT) also called a Fly-back Transformer and or a shorted Horizontal Output Transistor (HOT). I would first check the Transistor to see if it is shorted between the emitter and collector (to do this use a multimeter set to "Rx1") and the reading between the emitter and collector should be near infinite no reading, if the reading is 000 ohms then the transistor is shorted and should be replaced. Now for the hard part, you technically can not check for shorted transformer turns in the IHVT using a multimeter, you will have to use a device which will allow you to do what is called a ring test. If you do not have this piece of equipment (IHVT tester), I would replace the IHVT just as a matter of good measure, since the HOT had drawn a lot of current I would assume that the IHVT was damaged to since it is in the serial path between the collector of the transistor and the VCC supply.

I hope this helps,

Thank you,

Shuttle83

llc.com/">http://www.electron-age-technologies-llc.com

Jan 19, 2009 | Proton MM2701VT 27" TV

1 Answer

I have a magavox big screen


Hello cce357,

This can be any number of things, here is a possible listing:

1) No High Voltage (check the IHVT or the trippler)

2) CRT filament transformer winding open (check the windings that supply voltage to the CRT filaments)

3) Video / CRT socket boards bad (highly unlikely but check anyway)

4) High Voltage power supply malfunctioning (related to problem #1)

This listing is a good starting point. I would suggest that you purchase a schematic to aid in testing the voltages mentioned in the 4 steps above. If you have a background in electronics then do the above, if not please ask a qualified TV technician to perform these steps.

Thank you,

I hope this helps,

Shuttle83
http://www.electron-age-technologies-llc.com

Dec 08, 2008 | Philips Magnavox 55P9271 55" Rear...

1 Answer

Help. Please, TV won't come on.


Hello bassnut_22,

This sounds like a power supply problem. 9 times out of 10 you are dealing with soldered components. Now for the bad news, you are not going to solve this problem by just getting the parts that you need as easy as you think, any number of things can be wrong with tis TV. First I would check the Horizontal Output Transistor to see if it is shorted to ground (check the collector in reference to ground), also I would advise checking the Integrated High Voltage Transformer (voltage output test, resistance test, capacitance test and ring test). The tests of the IHVT will tell you if the transformer is bad and in need of replacement. These are the first checks you will need to do.

Thank you,

I hope this Helps,

Shuttle83

Sep 14, 2008 | Philips Magnavox 51MP392H Rear Projection...

1 Answer

Tv philips


Hello c_guerrero1,

This may be the shutdown circuit activating due to excessive current I would check the Horizontal Outout transistor, and the IHVT Intergrated High Voltage transformer. These are usually the cause of these problems. I would advise getting this repaired at a TV repair shop, due to the nature of the problem and the section that may have the problem.

Thank you
Shuttle83

Sep 09, 2008 | Philips Magnavox 51MP392H Rear Projection...

1 Answer

Have sound no pic


Hello tshotwell,

I would start by checking the IHVT for High Voltage output this can be done with a HV probe. Then if no HV is present I would check to see if the filament voltage for the CRTs is working, after that I would check the CRTs using a CRT tester (checking for shorts). These are a few of the beginning test that could be done. You will need a schematic of the TV, a High voltage probe, a CRT tester (can be purchased from ebay) and a multimeter. If you do not have experience in electronics, I would suggest having a TV repair person check the TV out for you.

Sep 07, 2008 | Philips Magnavox 51MP392H Rear Projection...

1 Answer

No picture


Hello susbudi and Jazz617,

I would suggest do a check on the voltage from the IHVT to the High Voltage multiplier.
This will determine if this is a HV problem or not. If it is not It may be a video delivery problem which would have similar results. In any event both of these tasks I would suggest be preformed by a qualified TV repair technician.

I hope this helps,

Thank You,

Shuttle83

Jul 18, 2008 | Philips Magnavox 51MP392H Rear Projection...

2 Answers

My philips projection


Hello tee man,

This might be a problem with the IHVT (Integrated High Voltage Transformer), I would suggest that you get a qualified TV technician to look at your set because The testing needed involves exposing yourself to dangerous voltages.

I hope this helps,
Thank you,
Shuttle83

Jan 23, 2008 | Philips Magnavox 9P6034C 60" Rear...

1 Answer

No picture


Hello MrJunebug,

You may have a problem with the IHVT (Integrated High Voltage Transformer). If this is the case I would suggest that you have a qualified TV technician fix this problem for you.

I hope this helps,
Thank you,
Shuttle83

Jan 23, 2008 | Philips Magnavox 27MS343S 27" TV

1 Answer

Magnavox FP5210W103


Thats the flyback(high voltage transformer) Or the Focus/High Voltage distribution block. In ant case your shouldnt touch eather as there is enough Hi voltage there to kill you. Please seek out a pro to assist you in this repir. A tv set is not a place to experiment with. Good Luck

Jul 30, 2006 | Philips Magnavox 51MP392H Rear Projection...

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